#pragma once

#include<iostream>
#include<cstdio>
#include<string>
#include<sys/stat.h>
#include<sys/types.h>
#include<fcntl.h>
#include<unistd.h>
#include"comm.hpp"

#define PATH "."
#define FILENAME "fifo"

class NameFifo
{
public:
    NameFifo(const std::string &path, const std::string &name)
    : _path(path), _name(name)
    {
        _fifoname = _path + "/" + _name;
        umask(0);
        //新建管道
        int n = mkfifo(_fifoname.c_str(), 0666);
        if(n < 0)
        {
            ERR_EXIT("mkfifo");
        }
        else
        {
            std::cout << "mkfifo success" << std::endl; 
        }
    }
    ~NameFifo()
    {
        //删除管道
        int n = unlink(_fifoname.c_str());
        if(n == 0)
        {
            //ERR_EXIT("unlink");//bug,先析构fifo，导致shm的析构没有调用
        }
        else 
        {
            std::cout << "remove fifo success" << std::endl;
        }
    }

private:
    std::string _path;
    std::string _name;
    std::string _fifoname;
};

class FileOper
{
public:
    FileOper(const std::string &path, const std::string &name)
    :_path(path), _name(name), _fd(-1)
    {
        _fifoname = _path + "/" + _name;
    }
    void OpenForRead()
    {
        // 打开, write 方没有执行open的时候，read方，就要在open内部进行阻塞
        // 直到有人把管道文件打开了，open才会返回！
        _fd = open(_fifoname.c_str(), O_RDONLY);
        if(_fd < 0)
        {
            ERR_EXIT("open");
        }
        else
        {
            std::cout << "openR fifo success" << std::endl;
        }
    }
    void OpenForWrite()
    {
        _fd = open(_fifoname.c_str(), O_WRONLY);
        if(_fd < 0)
        {
            ERR_EXIT("open");
        }
        else
        {
            std::cout << "openW fifo success" << std::endl;
        }
    }
    void Wakeup()
    {
        //写入操作
        char c = 'c';
        int n = write(_fd, &c, 1);
        printf("尝试唤醒：%d\n", n);
    }
    bool Wait()
    {
        char c;
        int number = read(_fd, &c, 1);
        if(number > 0) 
        {
            printf("醒来: %d\n", number);
            return true;
        }
        return false;
    }
    void Close()
    {
        if(_fd > 0)
            close(_fd);
    }
    ~FileOper()
    {}


private:
    std::string _path;
    std::string _name;
    std::string _fifoname;
    int _fd;
};








